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-rw-r--r--kernel/sched.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index f92ce63edff..8a2bfd37ab4 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2034,11 +2034,8 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
return delta < (s64)sysctl_sched_migration_cost;
}
-
void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
{
- int old_cpu = task_cpu(p);
-
#ifdef CONFIG_SCHED_DEBUG
/*
* We should never call set_task_cpu() on a blocked task,
@@ -2049,11 +2046,11 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
trace_sched_migrate_task(p, new_cpu);
- if (old_cpu != new_cpu) {
- p->se.nr_migrations++;
- perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS,
- 1, 1, NULL, 0);
- }
+ if (task_cpu(p) == new_cpu)
+ return;
+
+ p->se.nr_migrations++;
+ perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, 1, NULL, 0);
__set_task_cpu(p, new_cpu);
}